Year: 2021
Type: article
Abstract: A triplon refers to a fictitious particle that carries angular momentum S=1 corresponding to the elementary excitation in a broad class of quantum dimerized spin systems. Such systems without magnetic order have long been studied as a testing ground for quantum properties of spins. Although triplons have been found to play a central role in thermal and magnetic properties in dimerized magnets with singlet correlation, a spin angular momentum flow carried by triplons, a triplon current, has not been detected yet. Here we report spin Seebeck effects induced by a triplon current: triplon spin Seebeck effect, using a spin-Peierls system CuGeO3. The result shows that the heating-driven triplon transport induces spin current whose sign is positive, opposite to the spin-wave cases in magnets. The triplon spin Seebeck effect persists far below the spin-Peierls transition temperature, being consistent with a theoretical calculation for triplon spin Seebeck effects.
Source: Nature Communications
Authors: Yao Chen, Masahiro Sato, Yifei Tang, Yuki Shiomi, Koichi Oyanagi, Takatsugu Masuda, Yusuke Nambu, Masaki Fujita, Eiji Saitoh
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,560
Awards: G1611440491, Pioneering of neutron spin polarization material science, G1992719331, Investigation of nuclear spin-current science and nuclear thermoelectric conversion, Study on spinon spin current by inelastic neutron scattering technique, Spin transport at normal metal/paramagnetic material, Theoretical study of laser-driven ultrafast spintronics, Spin transport phenomena in Dirac magnets and their applications for spintronics, G3242849640, G3457601975, G3522129312, G3940491783, Frustration-induced spin textures, Study of novel piezoelectric responses in highly conductive materials, Elucidation of composite excitations by three-dimensional neutron spin polarization analysis using J-PARC, G4896398334, Establishment of neutron spin prism method and study of electron multi-dynamics of superconductors, G5475408225, G5497211134, G6153443356, スピン－フラクトロニックスの開拓, G6718509927, G6832372517, G692699164, G7028609133, G730758841, G7382943966, G7387215943, G7523347967, G7665501249, Emergent quantization phenomena in strongly coupled hybrid open quantum systems, G7879866177, G8169269587, Microscopic understanding of conventional spintronics materials and establishment of next-generation type spintronics mechanism through polarised neutron scattering
OpenAlex ID: W3196938994